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J. FFBAOKLUND.

7 FIRE BAR P No. 338,690. Patented Mar. 30,1886.

(No Model.) 2 Sheets-Sheet 2.

J. P. BACKLUND. FIRE BAR FOR LI UID FUEL FURNAOES.

No. 338,690. Patented Mar. 30, 1886.

WITNESSES INVENTOR B ZA A-tmme f w WW N, PETERS: PholmLmwmphar. Wunmgion, ac.

UNITED STATES PATENT "FFICE.

J OHAN FREDRIK BAGKLUND, OF STOCKHOLM, SWEDEN, ASSIGNOR TO PETTER OSTBERG, OF SAME PLACE.

FIRE-BAR FOR LIQUID-FUEL FURNACES.

SIECIPICATION forming part of Letters Patent No. 338,690, dated March 30 1886.

Application filed November 4, 1885. Serial No. 181,871. (No model.)

To aZZ whom it may concern:

Be it known that I, J OHAN FREDRIK BACK- LUND, of Stockholm, Sweden, have invented a certain new and useful Improvement in Fire- Bars for Liquid-Fuel Furnaces, of which the following is a specification.

My invention relates to an improvement in fire-bars, such as shown by the United States Patent of Ludvig Nobel, No. 321,840, dated July 7, 1885. In said patent trough-like firebars were arrangedthe one above another and provision was made for supplying the uppermost fire-bar with liquid fuel and for supplying the successive fire-bars with the liquid fuel by overflow. The overflow was by way of pans connected with the trough-like fire-bars and arranged outside the front wall of the fire-chamber of a furnace, or outside of the front of a fire-box in some cases. The liquid fuel in these pans was thus left exposed, or wholly without the furnace in connection with which the fire-bars were used. Such construction answered well with certain of the heavy hydrocarbon fuels, but was found objectionable when using the lighter hydrocarbons, because of the flaming of the liquid in the outside pans. To guard against the production of flame outside the furnace I have devised fire-bars which are adapted to be set in the front wall of the fire-chamber or firebox of a furnace, and have the overflow-pipes for conveying the fluid from one bar to another also within said wall.

In the accompanying drawings, Figure 1 is a front elevation showing a series of my improved trough-like fire-bars. Fig. 2 is a vertical section on the line 2 2 of Fig. 1, showing the fire-bars in position in the furnace-wall with a portion of the supply-pipe and a portion of the final overflow-pipe. Fig. 3 represents in vertical section a portion of a furnace with my improvements applied thereto.

As in the above-mentioned Nobel patent the topmost trough-like fire-bar, A, is employed simply to provide the air-space above the next below fire-bar, the top fire-bar serving as a support for that portion of the furnace-wall immediately above it. The supplypipe on passes down through the furnace-wall or fire box front through the opening in the bottom of the top fire-bar and down within the next below fire-bar. This second fire-bar of the series is provided with an overflow-pipe, B, passing through its bottom in the vertical plane of the supply-pipe, the top of this overflow-pipe extending above the level of the lower end of the supply-pipe, and the bottom of this overflow-pipe terminating below the level of the upper end of the similar overflowpipe of the fire-bar next below.

As shown, in Figs. 1 and 2 there are three, in Fig. 3 four, fire-bars proper, and the overflow-pipe from the lower one of these bars carries the excess of liquid hydrocarbon to any suitable reservoir, as heretofore.

Instead of providing a single overflow-pipe for each fire-bar, as above explained, I prefer to employ two of such pipes, as will be understood by reference to Fig. 1.

I claim as of my own invention 1. The trough-like fire-bar provided with the overflow pipe or pipes in its bottom, as and for the purpose set forth.

2. The combination of the several troughlike fire-bars, the supplypipe, and the overflow-pipes in the bottoms of the fire-bars, all arranged within the furnace-\vall, substantially as and for the purpose set forth.

I11 testimony whereof I have hereunto subscribed my name.

J OHAN FREDRIK BAOKLUN D.

Vitnesses:

Go'r'rEEIED LUNDBERG, HENRY E. HILL. 

